Scaffold-support.



IE .IvL & D. P. GAI/ANLAGE. A

SGAFPOLD SUPPORT.

APPLICATION FILED AUG. s, 1908.

Batented Jun 25, 1912.

NE l .l

man and DANJLEL F.

`nig application Serial erati g both .handling when moving 'the scaffolds from ropes v1s passed under the GKVAN'GFH, OF BROKLY'N, vNEVI? mieli,

speeiaaam-of Letteraria/em.

lamented 31111825, MR2.

Application ledugnst 3, 1908. Serial .No Mse.

T oelbwliem it may comm:

lBe it lmown that we, Encarta M. Carve- CAVANAGH, citizens of the Uni-ted States, and residents of the 4borough of .'Brookl n, eoun-ty of Kings, and Stateof New wk, have invented certain nea/'and useful Improvements in Scaffold- Supports,V of which-the following isa speciicatxon. K vThis invention relates to .scailfold-suppoi-besuch as are ydescribed in Jmy cti-pendlNumber 516,850, :such as are used l1 modern iron -or and more particularly lto in #the construction of -hi steel-frame structures, w peculiar to themselves on the used .during the pr rees of the same, vas convenience of imta ation, vcapability of moving from lHoor' to door, security, and positive manipulation.

Thebhject of our invention is to provide ast-ruotare having these characteristics, and for this prpose our invention consists of an improved scaffold-support, comprising two drums for winding and unwinding the snpportingro fes, and single :means for opruins, said means-being-shi-ft able out of engagement so as to permit the separate operation of the drums.

The invention consists further in arranging the parts'so that one end of one of the scaffold so as to aord greater security and safety. The vinvention consists further in so .arranging the platform or scaffold-frame that itwill be capable of being brought in line with the drum-frame so as. to A.provide an apparatus whichmay be folded up, so to say, and thushavea .device capable of'ready apparatus place to place.

The invention consists further in certain other tnovel features :and combination of parts which Will be 4more fully described encinafter andfinally pointed out in the claims.

ln the accompanying drawings, Figure l vrepresents a perspective view of our improved scaifold-support, showing the same in operative or open position, lFig. 2 is a side View of the same, showing the same in av position corresponding :to the closed Sposition so as to permit a ready iremoval ofthe same place to place, Fig. 3 .is ..detail view one ofuth'e 'meohanismsmsed to sespending to that shown porting-p ichmakedemands cure the Aplatatormframe l.to the drum-frame,-

showing .the :frames an a ,position *13015118* 1n Fig. ,2. el is another detail view of thesame device, showing a side view .of Athe parte 'when im 'a position similar to that of 1;-and Figi 5 Tis Aa detail 4View of the worm,.-showing capability of being detached troni its auwm.

Similar Aletters of responding parte.

'Referring to the drawings, the dnnznsi and 7 for windingand funvvinding the 'isa portingropes land @Jota-table@ sha ts Ireference 8 and 9 which have their-.ends in suitable bearings in the frame 18,' are Lprovided with gears'lO and 11 'at oneend,and with ratch- @ts iatmd 13 at .the ether. The fratehets are engaged by pawls 14 and 15 supported by pins 16 and 17 on .the vertical sidebar 81. he fname 18, in the-embodiment show-n in .the drawings, .is formed .Qf tvvo vertical side-bars transverse bars or reds 84 and 85, scanned together by nuts 19, the side-bers 8l and-83 supporting the bearings 4in .which the ends of the shatts 8 and 9 rotate, Whilefthe lower transverse bar85 is .provided with a guidepulley 42 rotating -on-the bar and rbetween two collars 32 4iined'ftheiveon by'scnews The bar 85 is also ='provided ywith `securing means which 'will be more fullydescribed hereinafter. On the side-barSB-iseupportod a bracket 20 substantially `of yU-shape having its base secured totheside-bar83-bythe bolt 27, vand having its two `arms 21 and A28- extcnd-ing inwardly between the sidebar 483 and side-bar 81 -so as =to have .the central points of the openings thereininfaline `with theperiphery of vthe gear-wheels il() and 11'.

A pin 22 passes through th e.ope nimg of theY 4ingithe key 23 and svithdmawing the :pin 22,

the Worm 25 may be removed, and thus 'being throught out of engagement with the gears, each gear may 8l and 83, and two.

be #rotated vin either M0 direction as desired. The object'ofthis is to permit either gear -to be moved indeipendently of the other-so as'to -take up any ,inequality in the' ropes, or 1n other words, [permit a .ready horizontal equalization of the scaffold or latform. The rotation of the gear of the rums may bebrought about by a s'uitable-.crank-wrench engaging the square'ends 30 and 31 of the shafts 8 and 9. During the equalizing rotation of the .drums 6 and 7, the ratchets and pawls engaging therewith must be correspondingly manipulated to permit the desired movement. n

A second part of our invention consists in the arrangement of the platform-frame. This platform-frame, constitutes the scatl fold proper, and is called in the trade putlocks or ledgers. Hitherto, one drum was placed on the platform-frame at each side of the same and separately manipulated, or one drum was placed at'each side of the platform-frame, but at the' top end of the ropes, namely on vthe supporting-beams,

which vare not shown in the drawings but whichare well'known in the operation of these scatfold-'supports and to which the upper ends of the supportingv ropes are secured.

Our invention consists in the arrangement of the drums oneY side at the platformframe, ofi' from' 'the building side, and passing one of the suppor ing ropes under the `platform-frame, name y, from one of the drums and over a pulley in proximity thereto, and then under the platform-frame and over a pulley located at the inner end of the platform-frame close to the building side. This arrangement has the great advantage of facilitating the manipulation, affording a practical arrangement of the parts, counter-balancing of weights, sincev the workman usually stands atthe innermost or building side of the platform or seai'old, and additional safety since the supporting rope passes, so to say, in loopv fashion under theplatform. For this purpose the ends 46 of the frame 40 are'arvranged substantiallylparallel and provided 5o' with'bearing-plates M supporting the shaft 45 of pulley'43.-

Another part. of our invention consists in having the ends of the platform-frame' pivotally connected to thedrum-rame so as to permit the' positioning of the platformframe in a position as shown in 2, that is, in the closed position, the platformframe surrounding 1n ,this position the drum-frame. tirel' open so that it maybe swung upwar ly mtoA this position in which the sidebars of the two fra-mes arealined with each other while thenarrowed portion of the platform-framein which the ,pulley 43 is iournaled is located above the drum-frame.

The platform-frame is en.

The. ivoting or hinging of the two frames is eifleicted by meansof-the lower cross-bar or cross-rod-'S on' the ends vof whichthe ends of the platform-framefare arranged 'to swing.

In orderto preventthe insecurity of the platform-frame during its operative o open' position, such as shown in Fig. l, the lower ends of the drum-frame are provided with.

holes or slots 4.9 substantially at right angles to each other, in the embodiment shown in the drawing, andthe ends of the frame 40 areprovided with holes' or slots 48 also at right angles to each other andV registeringl with the holes or slots of .the

dimm-frame collars 39 are provided. VVlin` it is desired to fold up the scaffold-support, from the operative position shown in Fig. i, to the inoperative or closed position shownfin Fig. 2, collars 35 are drawn inwardlyagainst the action 'of the springs 34 whereby the keys 38 sliding in slots 4:9 are brought out of engagement with the slots 48 of the side-bars 81 and 83. The locking action being thus interrupted. or discontinued, athe platform-frame 40 may be readily moved in the position shown -in Fig. 2. When the .frame 40 arrives at the position shown lin Fig. 2, namely With its side-bars in line withthe side-bars 81-andrv S3, then the slots 48 will be in lin'ewith the keys 38 of the collar 35 vand immediately,

by virtue of the outward pressure of the springs '34, an engagement willtalce plane and the parts be caused to be automatically locked in position. .either the open or closed position locks the partsl in such a position as to' prevent any slipping act-ion which'might be dangerous 'to' the occupants of the scatlold.

Our scaiiold has the advantage of sim-I plicity in construction and operation and facility of installation and removah. to-

gether with safety and etiicient operation.

Having thus described our invention, We

claim as new and desire to secure .by Letters;

Patent 1. In a scaffold-support, thecomloination 1 of a'drum supporting frame and an open platform-supporting frame pivoted to the drum-supporting frame atthe bottom andV movable into the same plane therewith.

2. Ina scaffold-supporgthe combination This locking-action in of a drumeupporting frame embodying sidebars anti a platornrsupporting frame.

embodying side bars pivoted at their ends to the side bars of the drumsupporting frame, and,arrangetl to be capable o surrounding and inclosing the drum-support ing fra-ine. i 'Y 4 3. A scaliol-support comprising a rirumsupporting frame ing frame, said platform supporting frame being adapted'to be brought into operative position substantially at right angles to said drum-frame and to be brought into closed position substantially in the same plane with the drum-frame.

4r. In a lscafol@support the combination oi a tlruin frame, a platform frame hinged thereto, andmeans for locking said frames substantially at right angles to each other or substantially .in the same plane,

5. in ahscatiold-support, the combination of a drum supporting frame, a 'platform supportingfframe hinged thereto .and havt the drum-supporting r hinged to 'the means of said said bars at-the lower part of the uw an o .,erative' osition at ri ht an lesto .n I g frame and an inoperative position inv the position in the same lane with said, drinn su ortin frame i l a and means for automatically locking the trames in fixed relation when the platform supporting trarne reaches either of said positions.

t3. In a scaffold-support the combination of a drum supporting frame embodying a cross-rofl, a platform supporting frame drum supporting frame by cross-rod and arranged to be swung upwardly into the same plane With the drum supporting frame, and means asso oiated with said cross-rod to automatically lool; the platform supporting traine in operative and inoperative position.

7. in a scai'old-snpport, the combination of a drumfsupporting frame embodying upright side-barsancl a crossrod connecting 'frame and extending at their ends beyondy said bars,

and a platform supporting,frame coinprisand a platform-support? ing side-bars pivoted `to thev endsnlof said cross-rod and arranged to be moved into the same lane 1vvith the first named sidelbars.

8, '.n a scaiiolfl support, the combination said frames are pivoted togetherywinding' means carried by .the drum supportin frame, a pulley Wheel carried by the platform supporting traine and another pulley Wheel rotatably mounted on said pin.

and a drum having a gear on said frame, a U-shaped bracket on said frame with its yoke at one side of ameniber of said frame,

.and a Worm supported in said bracket at the opposite side of said frame-member and engaging the gear of the drum.

l1. In ascai'old-support having alsup a pair of upright side-bars porting frame, thereon and a rotary-drum mounted between the side-bars and carrying a'gezm' the combination of a U-shaped bracket having its yoke secured to one of said side bars at the outside of the same and having alined bearing bores in its arms at the inside of the frame, the gear on the rotary drum, and a spindle for the Worm engaging said bores. In testimony, I'thatwe claim the foregoing as our invention, We havesigned our names in presence of two subscribing Witnesses. y

` EUGENE' M. CAVANAGH.

DANEL F. CAVANAGH. 1Witnesses: 4

yIVIICHA'EL CAVANAGH, HENRY J SUHRBIER.

An a scaffold-support having a frame 4 a Wormbet-Ween said arms engaging. 

